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Carrier 30GK Compressor faults 6.4.1.1 - General, Compressor protection devices, Starter Guard

Models: 30GK

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6.4.1- Compressor faults 6.4.1.1 - General

Each compressor is protected against multiple faults by two digital inputs located on the control board. If one of these inputs opens, it causes an immediate shutdown on the compressor without any action from the basic board.

6.4.1.2 - Compressor protection devices

On PRO-DIALOG Plus units, compressors are individually protected by the following devices connected to the digital inputs on the compressor control board:

ALARM CODE DESCRIPTIONS

DGT (only for units with low-temperature option):

The discharge gas thermostat detects and protects the compressor against abnormally high discharge temperatures.

Starter Guard:

This board patented by Carrier (also called AM board) monitors both the compressor regime and the status of its crankcase heaters which ensure correct lubrication when the compressor starts.

Code	Alarm name	Action	Pumpdown	Reset type	Probable cause
101	DGT fault, compressor A1	Circuit A shut down	No	Manual	Hot gas thermostat contact open
102	Starter Guard fault compressor A1	Circuit A shut down	No	Ditto	Crankcase heater fault and open motor current
					fault detection board contact
201	DGT fault, compressor A2	Compressor A2 shut down		Ditto	Hot gas thermostat contact open
202	Starter Guard fault compressor A 2	Compressor A2 shut down		Ditto	Crankcase heater fault and open motor current
					fault detection board contact
301	DGT fault, compressor A3	Compressor A3 shut down		Ditto	Hot gas thermostat contact open
302	Starter Guard fault compressor A 3	Compressor A3 shut down		Ditto	Crankcase heater fault and open motor current
					fault detection board contact
401	DGT fault, compressor A4	Compressor A4 shut down		Ditto	Hot gas thermostat contact open
402	Starter Guard fault compressor A 4	Compressor A4 shut down		Ditto	Crankcase heater fault and open motor current
					fault detection board contact
501	DGT fault, compressor B1	Circuit B shut down	No	Ditto	Hot gas thermostat contact open
502	Starter Guard fault compressor B1	Circuit B shut down	No	Ditto	Crankcase heater fault and open motor current
					fault detection board contact
601	DGT fault, compressor B2	Compressor B2 shut down		Ditto	Hot gas thermostat contact open
602	Starter Guard fault compressor B 2	Compressor B2 shut down		Ditto	Crankcase heater fault and open motor current
					fault detection board contact
701	DGT fault, compressor B3	Compressor B3 shut down		Ditto	Hot gas thermostat contact open
702	Starter Guard fault compressor B3	Compressor B3 shut down		Ditto	Crankcase heater fault and open motor current
					fault detection board contact
801	DGT fault, compressor B4	Compressor B4 shut down		Ditto	Hot gas thermostat contact open
802	Starter Guard fault compressor B4	Compressor B4 shut down		Ditto	Crankcase heater fault and open motor current
					fault detection board contact

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Carrier 30GK manual Compressor faults 6.4.1.1 - General, Compressor protection devices, Starter Guard

Contents

Air-Cooled Liquid Chillers 50 Hz Installation, operation and maintenance instructions30GK Series PRO-DIALOG Control 2 - GENERAL DESCRIPTION TABLE OF CONTENTS1 - SAFETY CONSIDERATIONS 4 - SETTING UP PRO-DIALOG PLUS CONTROL5 - PRO-DIALOG PLUS CONTROL OPERATION 6 - DIAGNOSTICS - TROUBLESHOOTING1.2 - Avoiding electrocution 1 - SAFETY CONSIDERATIONS 1.1 - General2.2 - Abbreviations used 2 - GENERAL DESCRIPTION 2.1 - General3.2.2 - Slave boards 3 - HARDWARE DESCRIPTION 3.1 - General Control board3.2 - Electronic boards 3.2.1 - The basic board3.2.5 - Slave board addresses 3.2.6 - Power supply to the boards3.2.3 - The user interface 3.2.4 - Connections between boardsDischarge pressure sensors 3.3.3 - The evaporator pumps3.3.4 - The condenser pump 3.3.5 - Pressure sensorsdemand limit. It is active, whatever the unit operating type 3.4 - User connectionsVolt-free contacts 24 V a.c function. See section 5.8. This contact is active, whateverMain interface 4 - SETTING UP PRO-DIALOG PLUS CONTROL4.1 - Local interface general features 4.2.3 - Starting unit and selecting an operating type 4.2 - Unit start/stop control4.2.1 - Description 4.2.2 - Stopping the unit in local mode4.3.2 - Selecting a menu item 4.3.3 - Modifying the value of a parameter/access to a sub- menu4.3 - Menus 4.3.1 - Selecting a menuCONFIGURATION 4.4 - Generalmenu structurestructure 4.5 - Menu treeNOTE The items in brackets show what is displayed on the Displayed if the alarm exists - Not in use4.5.1 - Description of the Information menu 4.5.3 - Description of the Pressures menu 4.5.2 - Description of the Temperatures menu4.5.4 - Description of the Setpoints menu 4.5.6.2 - Menu description 4.5.5 - Description of the Inputs menu4.5.6 - Description of the Outputs/Tests menu 4.5.6.1 - General Page only displayed if configuration requires 4.5.7 - Description of the Configuration menu 4.5.7.1- General4.5.7.2 - Password 4.5.6.3 - Manual testsPEriod X MEnu SUB-MENU PERIOD CONFIGURATIONSUB-MENU HOLIDAY CONFIGURATION PERIOD 1 to4.5.7.3 - Description of the User 1 Configuration sub-menu 4.5.7.5 - Description of Date and Time configuration sub menu 4.5.7.4 - Description of the User 2 Configuration sub-menu4.5.7.8 - Description of the Broadcast sub-menu Typical timer program4.5.7.7 - Description of the Holidays sub-menus key. ‘rESET ALArM’ is then displayed. Press the select 4.5.8 - Description of the Alarms menu4.5.9 - Description of the Alarms History menu To reset all active alarms, continuously press the Enter4.5.10.1 - Description of the Runtimes 1 menu 4.5.10.3 - Maintenance menu description4.5.10 - Runtime menu description 4.5.10.2 - Description of the Runtimes 2 menu5.2 - Heating/cooling selection 5 - PRO-DIALOG PLUS CONTROL OPERATION 5.1 - Start/stop control5.4 - Condenser water pump control 5.7.2 - Reset5.3 - Evaporator water pump control 5.5 - Control interlock contact5.10 - Determining the lead circuit Demand limit by 0-10 V d.c. signal5.8 - Demand limit 5.9 - Capacity control5.15 - Head pressure control on water-cooled units 5.12 - Slave compressor start-up sequence5.13 - Controlling the EXV 5.14 - Head pressure control on air-cooled units5.20 - Controlling Pro-Dialog Plus units with a System Manager 5.19 - Master/slave assembly5.17 - High pressure load shedding function 5.18 - Pumping down6.3 - Resetting alarms Change-over procedure from cooling mode to heat reclaim mode6 - DIAGNOSTICS - TROUBLESHOOTING 6.1 - General 6.2 - Displaying alarmsReset type 6.4 - Alarm codesALARM CODE DESCRIPTIONS Alarm nameCode ALARM CODE DESCRIPTIONSAlarm name Reset typeStarter Guard 6.4.1 - Compressor faults 6.4.1.1 - General6.4.1.2 - Compressor protection devices DGT only for units with low-temperature optionPrinted in the Netherlands on totally chlorine-free paper Order No. 13040-76, 05.2000. Supersedes order No. NewManufactured by Carrier S.A., Montluel, France